Existing construction
If the new surface runs close to trees, assess root protection and avoid assuming that excavation is straightforward.
Why it matters for your resin patio: Photograph defects and previous patches so the retained layers and any rebuilding can be discussed separately. For a resin patio, it can affect pedestrian comfort, door connections, furniture space, drainage, edging and installation access.
Useful photograph: the whole existing surface plus close views of cracks, movement or patches.
